build: zip for macos

previsouly zip was built before pkg (as makefile dependency)
since pkg's only depend on rebar3 release tarball (not .zip)
makefile was updated but forgot to update the pkg build for macos

build

@@ -134,7 +134,7 @@ case "$ARTIFACT" in
         ;;
     pkg)
         if [ -z "${PKGERDIR:-}" ]; then
-            # zip should have been built as a Makefile dependency
+            make_zip
             log "Skipped making deb/rpm package for $SYSTEM"
             exit 0
         fi